{"id":"CVE-2020-26029","aliases":["EUVD-2020-18659","GHSA-rvr3-f3x4-3669"],"status":"published","title":"An issue was discovered in Zammad before 3.4.1. There are wrong authorization checks for...","description":"An issue was discovered in Zammad before 3.4.1. There are wrong authorization checks for impersonation requests via X-On-Behalf-Of. The authorization checks are performed for the actual user and not the one given in the X-On-Behalf-Of header.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00787,"percentile":0.56583,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-863"],"published":"2020-12-28T07:57:36Z","modified":"2026-10-24T10:30:47Z","products":[{"vendor":"zammad","product":"zammad"}],"references":[{"url":"https://zammad.com/news/security-advisory-zaa-2020-20","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-26029"},{"url":"https://github.com/advisories/GHSA-rvr3-f3x4-3669"}],"sources":{"cve":[{"id":"CVE-2020-26029","description":"An issue was discovered in Zammad before 3.4.1. There are wrong authorization checks for impersonation requests via X-On-Behalf-Of. The authorization checks are performed for the actual user and not the one given in the X-On-Behalf-Of header.","status":"published","published":"2020-12-28T07:57:36Z","modified":"2024-08-04T15:49:07.048Z","updated_at":"2026-11-02T14:35:46.129376Z"}],"euvd":[{"id":"EUVD-2020-18659","description":"An issue was discovered in Zammad before 3.4.1. There are wrong authorization checks for impersonation requests via X-On-Behalf-Of. The authorization checks are performed for the actual user and not the one given in the X-On-Behalf-Of header.","status":"published","published":"2020-12-28T07:57:36Z","modified":"2024-08-04T15:49:07Z","updated_at":"2026-11-03T03:07:15.778249Z"}],"ghsa":[{"id":"GHSA-rvr3-f3x4-3669","title":"An issue was discovered in Zammad before 3.4.1. There are wrong authorization checks for...","description":"An issue was discovered in Zammad before 3.4.1. There are wrong authorization checks for impersonation requests via X-On-Behalf-Of. The authorization checks are performed for the actual user and not the one given in the X-On-Behalf-Of header.","status":"published","published":"2022-05-24T17:37:23Z","modified":"2023-01-29T05:05:11Z","cwes":["CWE-863"],"updated_at":"2026-11-02T14:45:43.934947Z"}],"nvd":[{"id":"CVE-2020-26029","description":"An issue was discovered in Zammad before 3.4.1. There are wrong authorization checks for impersonation requests via X-On-Behalf-Of. The authorization checks are performed for the actual user and not the one given in the X-On-Behalf-Of header.","status":"published","published":"2020-12-28T08:15:11.21Z","modified":"2026-06-17T03:07:29.55Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:06:28.340168Z"}],"osv":[{"id":"CVE-2020-26029","description":"An issue was discovered in Zammad before 3.4.1. There are wrong authorization checks for impersonation requests via X-On-Behalf-Of. The authorization checks are performed for the actual user and not the one given in the X-On-Behalf-Of header.","status":"published","published":"2020-12-28T08:15:11.21Z","modified":"2026-10-24T10:30:47.022429525Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:15.879068Z"}]}}